The Act on Renewable Energy Sources (ERSA) is the statutory basis for the feed-in tariff, which is the main element of the Bulgarian support system. The ERSA also establishes an obligation to purchase and dispatch electricity from renewable sources. Regarding biofuels, persons introducing liquid fuels of crude oil origin for transportation shall be obliged to offer market fuels for diesel and petrol engines blended with biofuels (art. 47 par. 1 ERSA) (see reference for details on the quota: IEA/IRENA Global Renewable Energy Policies and Measures Database © OECD/IEA and IRENA, [November 2020]